|Alejandro, G J; Meve, U; Liede-Schumann, S: Two new species of Mussaenda (Rubiaceae) from Panay, Botanical Journal of the Linnean Society, 158, 87–92 (2008)|
Two new species of Mussaenda (Rubiaceae) from Aklan, Panay, Philippines are described and illustrated. Mussaenda ustii sp. nov. is distinct by its long pedicel (up to 7 mm), yellow with white margins corolla lobes forming a star and recurved stigma lobes which are always semi- or distinctly exserted in long-styled morphs. Mussaenda viridiflora sp. nov. is characterized by its white, sweet-scented corolla lobes, which are green tinged on the median ridges and bases, and strongly reflexed calyx lobes. A discussion of the relationships of the new taxa to closely related Philippine Mussaenda is provided.